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SDEF-UU/SDEK-UU Steel Cage European Standard Linear Bearing

Home · Products · Linear Bearing · SDEF-UU/SDEK-UU Steel Cage European Standard Linear Bearing

SDEF-UU/SDEK-UU Steel Cage European Standard Linear Bearing

The SDEF/SDEK series bearings are high-end linear bearings that simultaneously meet European standard interfaces, utilize steel cages, and feature flange mounting. They combine three core advantages: European market compatibility, excellent high-speed/temperature performance, and high rigidity with convenient installation. They are specifically designed to provide top-tier motion components for export to Europe, for use in high-end European equipment, or for precision automation projects that meet international standards.

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Technology

The SDEF-UU/SDEK-UU steel cage European standard linear bearings offer two high-rigidity mounting options based on flange shape (round and square), both conforming to European standards.

Product Characteristics	SDEF-UU (Steel European Standard Round Flange Type)	SDEK-UU (Steel European Standard Square/Rectangular Flange Type)	Core Selection Criteria
Core Positioning	A standard flange solution featuring European standard interfaces, compact installation and high performance.	European standard interface, extreme rigidity, reinforced flange solution for heavy-duty torque resistance.	Requires European standard interfaces and flange mounting; select the F-type or K-type based on torque requirements and available space.
Standardised Interfaces	Fully compliant with European standards. The flange diameter, bolt circle diameter (PCD) and thread specifications (e.g. M6, M8) are fully compatible with European automation components (motors, brackets), allowing for direct installation.	Same as SDEF-UU, featuring a standard European interface.	This serves as the ‘passport’ to high-end European supply chains and projects, ensuring seamless integration.
Flanges and Installation	Circular European standard flange. Compact design, easy to install, offering greater stability than standard bushings.	Square/rectangular European standard flanges. Offering an exceptionally large mounting surface and high resistance to overturning moments, this is the robust, heavy-duty choice within the European standard system.	The F-type addresses ‘standardised, convenient installation’, whilst the K-type addresses ‘heavy-duty, secure installation in accordance with European standards’.
Performance Advantages of Steel	Fully equipped with: high-speed operation capability, superior temperature resistance, and extended service life.	Fully equipped: Slower performance degradation and higher reliability under heavy loads and in potentially high-temperature environments.	Steel bearings are key to meeting the requirements of European equipment for high-speed, continuous production and long maintenance intervals.
Rigidity Performance	High. Provides reliable radial and torque resistance, meeting the requirements of most European standard precision equipment.	Extremely high. The wide flange achieves top-tier torsional and overturning rigidity within the European standard interface framework.	Where loads involve significant overhang or dynamic impact, the K-type is the cornerstone for ensuring the precision of European-standard equipment.
Typical Applications	Precision instruments exported to Europe, high-speed packaging machinery, and joints for light industrial robots.	Accessory drive shafts for high-end European machine tools, heavy-duty precision modules in semiconductor equipment, and guide mechanisms for large-scale testing equipment.	The F-type is used for dynamic precision units, whilst the K-type is used for heavy-duty critical workstations.

Technical Focus: Why does the European market need this series?
1. Market Matching: The European industrial sector has extremely high standards for equipment reliability, lifespan, and maintainability. The long-lasting, maintenance-free characteristics of steel cages perfectly match these requirements.
2. Design Synergy: Using standard European interfaces allows European engineers to directly utilize them in their familiar design software libraries and standard parts lists, greatly improving R&D efficiency and BOM accuracy.
3. Supply Chain Efficiency: As standardized European standard parts, customers can easily procure replacement parts locally in Europe, reducing maintenance costs and downtime risks throughout the equipment's lifecycle.

Applications
SDEF-UU: Suitable for high-speed, clean environment automation projects requiring integration with European PLC and servo systems, such as automated production lines in the European pharmaceutical and food industries.
SDEK-UU: Suitable for European standard heavy-duty equipment with heavy load and high precision requirements, such as the tool magazine mechanism of high-end German CNC machine tools, the roller bearing seats of large Italian printing machinery, and the core guide shafts of Swiss precision measuring machines.

The SDEF-UU/SDEK-UU steel cage European standard linear bearing is not just a product, but a deep understanding and respect for the European market and engineering culture.
Choosing the SDEF/SDEK series means that your product, from its core motion components, possesses the quality, standards, and reliability recognized by the European high-end industrial system.
It sends a powerful professional signal: your equipment is not only powerful in function, but also reaches internationally advanced levels in terms of integrability, maintainability, and long-term operational stability.

_Parameters

NomInal shaft diameter (mm)	Part No.	Weight (g)	Major dimenslons and tolerance
	Steel		dr		D		Df	L
	SDF(K)		mm	Tolerance(μm)	mm	Tolerance(μm)	mm	mm	Tolerance(μm)
8	SDEF 8-UU	41	8	+8 0	16	0 -13	32	25	±300
	SDEK 8-UU	33
12	SDEF 12-UU	80	12	+8 0	22	0 -16	42	32	±300
	SDEK 12-UU	64
16	SDEF 16-UU	103	16	8	26	0 -16	46	36	±300
	SDEK 16-UU	90
20	SDEF 20-UU	182	20	8	32	0 -19	54	45	±300
	SDEK 20-UU	147
25	SDEF 25-UU	335	25	10	40	0 -19	62	58	±300
	SDEK 25-UU	295
30	SDEF 30-UU	560	30	10	47	0 -19	76	68	±300
	SDEK 30-UU	465
40	SDEF 40-UU	1175	40	11	62	0 -22	98	80	±300
	SDEK 40-UU	975
50	SDEF 50-UU	1745	50	11	75	0 -22	112	100	±300
	SDEK 50-UU	1545
60	SDEF 60-UU	3220	60	11	90	0 -25	134	125	±300
	SDEK 60-UU	2780
80	SDEF 80-UU	6420	80	12	120	0 -25	164	165	±300
	SDEK 80-UU	5920

Part No.	Major dimenslons and tolerance						Eccentricity(μm)	Squareness(μm)	Basic load rating		NomInal shaft diameter (mm)
Steel	Flange								dynamic (C N)	static (Co N)
SDMH..	K mm	t mm	Dp mm	X mm	Y mm	Z mm
SDEF 8-UU	25	5	24	3.5	6	3.1	12	12	265	402	8
SDEK 8-UU
SDEF 12-UU	32	6	32	4.5	7.5	4.1	12	12	510	784	12
SDEK 12-UU
SDEF 16-UU	35	6	36	4.5	7.5	4.1	12	12	578	892	16
SDEK 16-UU
SDEF 20-UU	42	8	43	5.5	9	5.1	12	12	862	1370	20
SDEK 20-UU
SDEF 25-UU	50	8	51	5.5	9	5.1	15	15	980	1570	25
SDEK 25-UU
SDEF 30-UU	60	10	62	6.6	11	6.1	15	15	1570	2740	30
SDEK 30-UU
SDEF 40-UU	75	13	80	9	14	8.1	15	15	2160	4020	40
SDEK 40-UU
SDEF 50-UU	88	13	94	9	14	8.1	17	17	3820	7940	50
SDEK 50-UU
SDEF 60-UU	106	18	112	11	17	11.1	17	17	4700	9800	60
SDEK 60-UU
SDEF 80-UU	136	18	142	11	17	11.1	20	20	7350	16000	80
SDEK 80-UU